Donegan-Optical #DONDA4. OptiVisor is a precision binocular headband magnifier which permits unrestricted user efficiency while reducing eye strain - leaves both hands free and allows three dimensional vision - Used by anyone whose profession or craft requires close accurate work - Can be worn over prescription or safety eyeglasses.

Donegan-Optical #DONDA5. OptiVisor is a precision binocular headband magnifier which permits unrestricted user efficiency while reducing eye strain - leaves both hands free and allows three dimensional vision - Used by anyone whose profession or craft requires close accurate work - Can be worn over prescription or safety eyeglasses.